Question
suggest an alternative indicator for the standardization reaction. Explain the rationale behind your choice.
Used 10 g of KHP
Used 10 g of KHP
Answers
DrBob222
How can I suggest an alternative when I don't know what you used. And the indicator changes with the kind of titration you do.
If you used KHP, I assume that was to standardize something like NaOH. In that titration, the pH at the equivalence point is about 8.3 and phenolphthalein works very well. An alternative might be thymol blue.
See https://www.google.com/search?q=pH+ranges+indicators&client=firefox-a&hs=bPF&rls=org.mozilla:en-US:official&channel=sb&tbm=isch&imgil=7y2Qs3HujtiBqM%253A%253BEKG3q5UXdktFVM%253Bhttp%25253A%25252F%25252Fwww.chemistry-assignment.com%25252Fthe-range-of-an-indicator&source=iu&pf=m&fir=7y2Qs3HujtiBqM%253A%252CEKG3q5UXdktFVM%252C_&usg=__5VzxnCVMzn429QRtuDc7GE_z7AI%3D&biw=1006&bih=601&ved=0CDkQyjc&ei=MNAVVKfnHfeJsQTwoIGoCg#facrc=_&imgdii=_&imgrc=7y2Qs3HujtiBqM%253A%3BEKG3q5UXdktFVM%3Bhttp%253A%252F%252Fwww.chemistry-assignment.com%252Fwp-content%252Fuploads%252F2013%252F02%252F1107.png%3Bhttp%253A%252F%252Fwww.chemistry-assignment.com%252Fthe-range-of-an-indicator%3B675%3B248
If you used KHP, I assume that was to standardize something like NaOH. In that titration, the pH at the equivalence point is about 8.3 and phenolphthalein works very well. An alternative might be thymol blue.
See https://www.google.com/search?q=pH+ranges+indicators&client=firefox-a&hs=bPF&rls=org.mozilla:en-US:official&channel=sb&tbm=isch&imgil=7y2Qs3HujtiBqM%253A%253BEKG3q5UXdktFVM%253Bhttp%25253A%25252F%25252Fwww.chemistry-assignment.com%25252Fthe-range-of-an-indicator&source=iu&pf=m&fir=7y2Qs3HujtiBqM%253A%252CEKG3q5UXdktFVM%252C_&usg=__5VzxnCVMzn429QRtuDc7GE_z7AI%3D&biw=1006&bih=601&ved=0CDkQyjc&ei=MNAVVKfnHfeJsQTwoIGoCg#facrc=_&imgdii=_&imgrc=7y2Qs3HujtiBqM%253A%3BEKG3q5UXdktFVM%3Bhttp%253A%252F%252Fwww.chemistry-assignment.com%252Fwp-content%252Fuploads%252F2013%252F02%252F1107.png%3Bhttp%253A%252F%252Fwww.chemistry-assignment.com%252Fthe-range-of-an-indicator%3B675%3B248